Seagate ST9450204SS Savvio 10K.1 FC Product Manual - Page 36
Power dissipation
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6.3 Power dissipation ST973401FC Typical power dissipation under idle conditions in 1Gb operation is 6.6 watts (22.5 BTUs per hour). Typical power dissipation under idle conditions in 2Gb operation is 6.9 watts (23.7 BTUs per hour) To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 6). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123. ST973401FC DC CURRENT/POWER vs THROUGHPUT (1GB) Random 8 Block Reads 1.200 12.00 5Vo lt A 12 Volt A 1.000 10.00 Watts Amperes Power (watts) 0.800 8.00 0.600 6.00 0.400 4.00 0.200 2.00 0.000 0.0 0.00 50.0 100.0 150.0 200.0 250.0 300.0 I/Os per Second Figure 6. ST973401FC DC current and power vs. input/output operations per second at 1 Gbit ST973401FC DC CURRENT/POWER vs THROUGHPUT (2GB) Random 8 Block Reads 1.200 12.00 5Vo lt A 12 Volt A 1.000 10.00 Watts Amperes Power (watts) 0.800 8.00 0.600 6.00 0.400 4.00 0.200 2.00 0.000 0.0 0.00 50.0 100.0 150.0 200.0 250.0 300.0 I/Os per Second Figure 7. ST973401FC DC current and power vs. input/output operations per second at 2 Gbit 30 Savvio FC Product Manual, Rev. D